function total = flog2(data)
           [K, L] = size(data);
           total = zeros(K, L);
           for i=1 : K
               for j = 1 : L
                   val = data(i,j);
                   if(val > 0 && val < 1)
                      total(i,j) =  log2(val);
                   end
               end
           end
end